Abstract: Procedure for preparing a laminated plate structure having an optical fiber situated therein, in which the optical fiber is situated between two respective laminating agent layers, in turn situated between two glass plates, the optical fiber extending out from the structure at opposite ends thereof. Grooves are cut out of the laminating agent layers around both opposite ends of the fiber extending out form the structure, with tubes being inserted over these respective opposite ends of the fiber and into the grooves, so that the fibers can move freely within these respective tubes. Then, the tubes and adjoining plates are adhered to one another, with appropriate compression being applied to form the final laminated structure.

Abstract: The present invention relates to a wallpaper which comprises an optical fibre which together with an outside control and/or alarm unit forms a closed optical circuit. The wallpaper is a sheet made from a suitable material, e.g. paper, plastic material and textile fabrics. This material may have the adhesive layer on itself. Alternatively, the adhesive is applied before lamination. The invention relates also to a process for the manufacture of the wallpaper.